Our Reduced Shank (Silver & Deming) Drill Bits are exactly what you'll need to complete the first step in the Screw Thread Insert installation process. The drill will clean up the original, damaged threads and pave the way in creating a new, stronger thread.

Shank Diameter: 1/2"

The 1 13/64" HSS Reduced Shank Drill is designed for use with the following screw thread inserts...